Investment Securities - Narrative (Details) - USD ($) |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Marketable Securities [Abstract] | |||
| Available-for-sale securities sold | $ 0 | $ 0 | |
| Available-for-sale, accrued interest, after allowance for credit loss | 26,000,000 | $ 28,000,000 | |
| Transfers between available for sale and held to maturity debt securities | 0 | 0 | |
| Held-to-maturity, accrued interest, after allowance for credit loss | 3,000,000 | 3,000,000 | |
| Allowance for credit loss | 0 | 0 | |
| Carrying amount of equity investments without a readily determinable fair value | 122,000,000 | $ 119,000,000 | |
| Unrealized net losses for equity investments with readily determinable fair value | $ 1,000,000 | $ 2,000,000 | |
| X | ||||||||||
- Definition Transfers Between Available For Sale And Held To Maturity Debt Securities No definition available.
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| X | ||||||||||
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with interest rate reset through auction process, sold at par value. No definition available.
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of allowance for credit loss for debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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